Brother LZ2-B850 User manual

LZ2−B850, B850W, B851 1/5
2001.4
LZ2−B850 

B850W
LZ2−B851
Single Needle Zigzag Lock Stitcher
Specifications
Zigzag stitch 1 - needle Bottom feed Height of
Presser foot Needle stroke Max. sewing speed
B850 Zigzag width
5 mm **
B850W * *
B851 Zigzag width
8 mm **
Manual 6 mm
Knee 10 mm 33.3 mm 5,000 rpm
B850 - 1, B850W - 1, B851 – 1
(Foundation) B850 - 3 (Long stitch)
Max. stitch lenght 2.5 mm 5 mm
Thread take up Rotary
Presser pressure 20 – 60 N
Needle type SCHMETS SY1965 Nm70(#10)
Hight of feed dog 1 mm
Arm pocket area W269 ×D178 mm
LZ2-B851-
3-step zigzag
LZ2-B850-
Plain zigzag
(narrow)
LZ2-B850W-
Plain zigzag
(wide)
Use
1 General (foundation) Use
1 General (foundation)
Use
1 General (foundation)
3 General (long stitch)

LZ2−B850, B850W, B851 2/5
2001.4
Gauge parts list
Zigzag width Needle plate Presser foot assy Feed dog
S48064-001 S48293-001 S52435-001
For general 3-step zigzag
S48065-001 S48299-001 S52436-001
Good for sewing smoothlyat sewing
start and overlapping sections
S48305-001 S48143-101
For long stitch feed
S48145-101
For long stitch feed
8 mm
S54922-001 S54933-001
Good for sewing requiring frequent
change of base line
*The presser feet with chamfering (S48299-001, S48305-001) are suitable for long stitch feed sewing.

LZ2−B850, B850W, B851 3/5
2001.4
Gauge parts list
Zigzag width Needle plate Presser foot assy Feed dog
S06166-001 S52068-001
For general plain zigzag
S53410-001
S48308-001
S54937-001
For sewing light material
S06170-101
Suitable for plain zigzagging with tape
widely stretched
S48066-001 S06171-101
5 mm
S48067-001
S54929-001 S54956-001 S54945-001
For sewing tape, hook, and edge of bra
3 mm S54930-001 S54957-001 S54946-001
For sewing tape, hook, and edge of bra

LZ2−B850, B850W, B851 4/5
2001.4
Option parts
Separate type presser bar.
Ref. No. Part name Part code Q’ty
1 Presser bar, U S50114-001 1
< For presser foots for lock stitch >
2-1 Presser bar tip, A S50115-001 1
< For standard presser foots >
2-2 Presser bar tip, B S50116-001 1
Thread tension assy (disc type)
Ref. No. Part name Part code Q’ty
7-2 Thread tension assy S51808-001 1
7-2-1 Thread tension bracket S48084-001 1
7-2-2 Thread take-up spring S02620-001 1
7-2-3 Tension stud 116922-001 1
7-2-4 Disc presser, ;Tension 159805-001 1
7-2-5 O ring, S14 081014-870 1
7-2-6 Spring, tension ;M 104525-001 1
7-2-7 Disc, ;Tension 145446-001 2
7-2-8 Washer S12441-001 1
7-2-9 Tension nut S31032-001 1
7-2-10 Set screw, SM3.57 100402-004 1
9-2 Tension release pin S51809-000 1

LZ2−B850, B850W, B851 5/5
2001.4
Thread guide, F / Felt
Ref. No. Part name Part code Q’ty
22 Thread guide, F S51814-001 1
23 Felt 114941-001 1
Rotary hook
Ref. No. Part name Part code Q’ty
32-2 Rotary hook assy, HP w/box
(carbide reinforced hook tip) S51821-901 1
32-2 Rotary hook assy w/box;ST
(for medium-weight materials) S55026-901 1
Thread take-up
Part name Part code Q’ty
Rotary thread take-up lever (for plain zigzag and tape attaching) S54996-001 1